systemd/0021-rfkill-fix-erroneous-behavior-when-polling-the-udev-.patch
Zbigniew Jędrzejewski-Szmek 27bd1bd49f Backport some patches
2017-07-31 15:52:44 -04:00

46 lines
1.7 KiB
Diff

From cb81159ce49380d39c80f803353784633b8f306c Mon Sep 17 00:00:00 2001
From: "S. Fan" <sfanxiang@gmail.com>
Date: Mon, 31 Jul 2017 05:10:10 -0500
Subject: [PATCH] rfkill: fix erroneous behavior when polling the udev monitor
(#6489)
Comparing udev_device_get_sysname(device) and sysname will always return
true. We need to check the device received from udev monitor instead.
Also, fd_wait_for_event() sometimes never exits. Better set a timeout
here.
(cherry picked from commit 8ec1a07998758f6a85f3ea5bf2ed14d87609398f)
---
src/rfkill/rfkill.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/rfkill/rfkill.c b/src/rfkill/rfkill.c
index c0f138b4f4..470853d1d2 100644
--- a/src/rfkill/rfkill.c
+++ b/src/rfkill/rfkill.c
@@ -138,17 +138,21 @@ static int wait_for_initialized(
for (;;) {
_cleanup_udev_device_unref_ struct udev_device *t = NULL;
- r = fd_wait_for_event(watch_fd, POLLIN, USEC_INFINITY);
+ r = fd_wait_for_event(watch_fd, POLLIN, EXIT_USEC);
if (r == -EINTR)
continue;
if (r < 0)
return log_error_errno(r, "Failed to watch udev monitor: %m");
+ if (r == 0) {
+ log_error("Timed out wating for udev monitor.");
+ return -ETIMEDOUT;
+ }
t = udev_monitor_receive_device(monitor);
if (!t)
continue;
- if (streq_ptr(udev_device_get_sysname(device), sysname)) {
+ if (streq_ptr(udev_device_get_sysname(t), sysname)) {
*ret = udev_device_ref(t);
return 0;
}